| [molecular mechanisms of cephalosporin resistance in gram-negative bacteria of the enterobacteriaceae family]. | extended spectrum beta lactamase genes were detected by the pcr in 87.6% of 231 enterobacteriaceae strains isolated in medical institutions of moscow, st. petersburg, tomsk and nazran that showed a decrease in their susceptibility to 3rd generation cephalosporins. alone or in various combinations tem type beta lactamases were detected in 43.3% of the isolates, 46.8 and 51.2% of the isolates produced shv type and ctx type beta lactamases respectively. combinations of 2 and 3 different determinant ... | 2004 | 15344391 |